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<?php
/* vim: set expandtab tabstop=4 softtabstop=4 shiftwidth=4: */
/**
* Image_Barcode_int25 class
*
* Renders Interleaved 2 of 5 barcodes
*
* PHP versions 4
*
* LICENSE: This source file is subject to version 3.0 of the PHP license
* that is available through the world-wide-web at the following URI:
* http://www.php.net/license/3_0.txt. If you did not receive a copy of
* the PHP License and are unable to obtain it through the web, please
* send a note to license@php.net so we can mail you a copy immediately.
*
* @category Image
* @package Image_Barcode
* @author Marcelo Subtil Marcal <msmarcal@php.net>
* @copyright 2005 The PHP Group
* @license http://www.php.net/license/3_0.txt PHP License 3.0
* @version CVS: $Id$
* @link http://pear.php.net/package/Image_Barcode
*/
require_once "PEAR.php";
require_once "Image/Barcode.php";
/**
* Image_Barcode_int25 class
*
* Package which provides a method to create Interleaved 2 of 5 barcode using GD library.
*
* @category Image
* @package Image_Barcode
* @author Marcelo Subtil Marcal <msmarcal@php.net>
* @copyright 2005 The PHP Group
* @license http://www.php.net/license/3_0.txt PHP License 3.0
* @version Release: @package_version@
* @link http://pear.php.net/package/Image_Barcode
*/
class Image_Barcode_int25 extends Image_Barcode
{
/**
* Barcode type
* @var string
*/
var $_type = 'int25';
/**
* Barcode height
*
* @var integer
*/
var $_barcodeheight = 50;
/**
* Bar thin width
*
* @var integer
*/
var $_barthinwidth = 1;
/**
* Bar thick width
*
* @var integer
*/
var $_barthickwidth = 3;
/**
* Coding map
* @var array
*/
var $_coding_map = array(
'0' => '00110',
'1' => '10001',
'2' => '01001',
'3' => '11000',
'4' => '00101',
'5' => '10100',
'6' => '01100',
'7' => '00011',
'8' => '10010',
'9' => '01010'
);
/**
* Draws a Interleaved 2 of 5 image barcode
*
* @param string $text A text that should be in the image barcode
* @param string $imgtype The image type that will be generated
*
* @return image The corresponding Interleaved 2 of 5 image barcode
*
* @access public
*
* @author Marcelo Subtil Marcal <msmarcal@php.net>
* @since Image_Barcode 0.3
*/
function &draw($text, $imgtype = 'png')
{
$text = trim($text);
if (!preg_match("/[0-9]/",$text)) return;
// if odd $text lenght adds a '0' at string beginning
$text = strlen($text) % 2 ? '0' . $text : $text;
// Calculate the barcode width
$barcodewidth = (strlen($text)) * (3 * $this->_barthinwidth + 2 * $this->_barthickwidth) +
(strlen($text)) * 2.5 +
(7 * $this->_barthinwidth + $this->_barthickwidth) + 3;
// Create the image
$img = ImageCreate($barcodewidth, $this->_barcodeheight);
// Alocate the black and white colors
$black = ImageColorAllocate($img, 0, 0, 0);
$white = ImageColorAllocate($img, 255, 255, 255);
// Fill image with white color
imagefill($img, 0, 0, $white);
// Initiate x position
$xpos = 0;
// Draws the leader
for ($i=0; $i < 2; $i++) {
$elementwidth = $this->_barthinwidth;
imagefilledrectangle($img, $xpos, 0, $xpos + $elementwidth - 1, $this->_barcodeheight, $black);
$xpos += $elementwidth;
$xpos += $this->_barthinwidth;
$xpos ++;
}
// Draw $text contents
for ($idx = 0; $idx < strlen($text); $idx += 2) { // Draw 2 chars at a time
$oddchar = substr($text, $idx, 1); // get odd char
$evenchar = substr($text, $idx + 1, 1); // get even char
// interleave
for ($baridx = 0; $baridx < 5; $baridx++) {
// Draws odd char corresponding bar (black)
$elementwidth = (substr($this->_coding_map[$oddchar], $baridx, 1)) ? $this->_barthickwidth : $this->_barthinwidth;
imagefilledrectangle($img, $xpos, 0, $xpos + $elementwidth - 1, $this->_barcodeheight, $black);
$xpos += $elementwidth;
// Left enought space to draw even char (white)
$elementwidth = (substr($this->_coding_map[$evenchar], $baridx, 1)) ? $this->_barthickwidth : $this->_barthinwidth;
$xpos += $elementwidth;
$xpos ++;
}
}
// Draws the trailer
$elementwidth = $this->_barthickwidth;
imagefilledrectangle($img, $xpos, 0, $xpos + $elementwidth - 1, $this->_barcodeheight, $black);
$xpos += $elementwidth;
$xpos += $this->_barthinwidth;
$xpos ++;
$elementwidth = $this->_barthinwidth;
imagefilledrectangle($img, $xpos, 0, $xpos + $elementwidth - 1, $this->_barcodeheight, $black);
return $img;
} // function create
} // class
?>
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